There can be only one.
3, a person, a ladder, and another lightbulb
None, the changes necessary will come from within.
None. That's a hardware problem.
V.
A Wii fit
Look under his kilt and if he has a quarter pounder then he is a McDonald.
Mick Jagger sings, "Hey you, get off of my cloud.. ", while the Scottish Highlander yells, "Hey McCloud, get off of my ewe!"